Hi,
You could try setting the box to fast start to see if that makes any difference or try a factory reset, just select the option to keep your recordings, that means you won't lose your recordings and any planned recordings or series links you've set up, you will have to sign into your apps such as iPlayer, Prime, Netflix and ITV Hub again, also Match frame rate and Standby power consumption will go back to their default settings if you have changed them.
Other users in the past have reported the white light going out and some have said it seem to fix itself, it might be that your box also has this peculiarity, if the box is fully working I would be tempted to see how it goes and if it does become a major annoyance then call Virgin on 150 from a Virgin phone or 0345 454 1111 from any other phone, or wait to see if you get a response from the forum team.
